When evaluating denim quality, focus on fabric weight, typically measured in ounces (oz). For summer shorts, 8oz to 12oz is standard. Ensure the material composition meets your needs, such as 100% cotton for authentic vintage feel or 98% cotton and 2% spandex/elastane for stretch and comfort. Additionally, verify the wash process (e.g., stone wash, acid wash, or enzyme wash) to ensure color consistency across batches and check for reinforced stitching at stress points like the crotch and pockets.